Aberrant Expression of DPPA2 and HIWI Genes in Colorectal Cancer and Their Impacts on Poor Prognosis

Overview

Journal Tumour Biol

Publisher Sage Publications

Specialty Oncology

Date 2014 Feb 18

PMID 24532429

Citations 16

Authors

Reza Raeisossadati

Mohammad Reza Abbaszadegan

Meysam Moghbeli

Alireza Tavassoli

Alexandre Hiroaki Kihara

Mohammad Mahdi Forghanifard

Affiliations

Soon will be listed here.

Abstract

Cancer cells have countless behaviors of pluripotent embryonic stem cells and germ line cells, such as unlimited proliferation, self-renewal, and migration. Expression of specific germ line and embryonic genes in tumor cells may be associated with indefinite growth and invasiveness of such cells. Developmental pluripotency factor 2 (DPPA2) and HIWI are two important developmental genes which are involved in embryonic and germ line stem cell properties. Deciphering the role of these genes seems to be necessary for understanding cancer initiation and progression. Tumoral and normal tissues from 46 colorectal cancer (CRC) patients were subjected to gene expression analysis using quantitative real-time reverse transcription-polymerase chain reaction, prior to any therapeutic intervention. Overexpression of DPPA2 and HIWI was detected in 26.1 and 34.8 % of specimens, respectively. Significant correlation between DPPA2 overexpression and lymph node metastasis of the tumor cells (P=0.049) was seen in the samples with advanced stages (III/IV) of the tumor development. HIWI mRNA expression was significantly associated to the depth of tumor invasion (P=0.020) and the stage of tumorigenesis progression (P=0.030). In samples with overexpression of at least one gene, DPPA2 mRNA expression was significantly correlated to the stage of tumor (P=0.017). In the same samples, a significant correlation was observed between mRNA expression of HIWI and the stage of tumor cells (P=0.034). These results documented the important role of HIWI and DPPA2 in tumorigenesis and also in lymph node metastasis of tumor cells. Further evaluation is required to uncover the detailed role of HIWI and DPPA2 and their interactions in tumorigenesis of CRC.

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